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Abstract: Particle velocity distribution functions VDF in space plasmas often shownon Maxwellian suprathermal tails decreasing as a power law of the velocity.Such distributions are well fitted by the so-called Kappa distribution. Thepresence of such distributions in different space plasmas suggests a universalmechanism for the creation of such suprathermal tails. Different theories havebeen proposed and are recalled in this review paper. The suprathermal particleshave important consequences concerning the acceleration and the temperaturethat are well evidenced by the kinetic approach where no closure requires thedistributions to be nearly Maxwellians. Moreover, the presence of thesuprathermal particles take an important role in the wave-particleinteractions.



Autor: V. Pierrard, M. Lazar

Fuente: https://arxiv.org/



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